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I think the bs=446 will nuke the MBR portion of the boot loader. The rest can be inside the rest of the boot sector which is the track 0. Norton Ghost for example can store the entire cloning program inside the boot sector when exiting Xp, reboots and fires up the cloning program in DrDos.
Mind you syg00 is right in saying hdX will take a long time as you are cleaning up the entire disk.
"Boot viruses" as they are known in the windoze world must exist in the area reserved for executable code in the MBR.
Generally they use "unused" areas within that 446 byte range.
My first foray into intel assembler code was to hand de-code the Michaelangelo virus that had eaten one of our office machines.
What a piece of work that was - code in its most extreme simplicity.
I still have an "infected" floppy for educational purposes.
Nope - was required in that case.
For doing a whole disk think about using a *large* blocksize. I use 4k out of habit, but no reason (other than memory maybe) not to use something significantly larger.
Will speed things up nicely.
Thought I would spark interest from the thread starter, not ruffle your feathers, but then again, I was looking for both. You and I are somewhat two of a kind, we should converse through the e-mail link associated with our forum names rather than duke it out in a public place. I'ts 7 am here, time to hit the hay, please talk to me, I'll respond in due time. (When I awake).